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Publication numberUS154864 A
Publication typeGrant
Publication dateSep 8, 1874
Filing dateMar 6, 1874
Publication numberUS 154864 A, US 154864A, US-A-154864, US154864 A, US154864A
InventorsHaywaed A. Habvey
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improvement in bolts and nuts
US 154864 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

UNITED STATES PATENT OFFICE.

HAYWARD A. HARVEY, OF ORANGE, NEW JERSEY.

IMPROVEMENT IN BOLTS AND NUTS.

Specification forming part of Letters Patent No. 154,864, dated September 8, 1874; application filed March e, 1874.

To all whom it may concern;

Be it known that I, HAYWARD A. HARVEY, of Orange, New Jersey, have invented certain Improvements in Bolts and Nuts, of which the following is a specification:

My invention relates to bolts and nuts having threads of the kind known as ratchet or barbed threads; and consists in forming the bearing-surface of the thread of one at a different angle from that of the bearing-surface of the other, so that when the device is tightened upon an object the thread of the one shall bear upon the thread of the other at its outer edge only. the object being to make the fric- `tional bearing greatest at the outer edge, preferably, of the bolt-thread, so that the nut, when screwed home, will resist dislodgment with greater energy than when the ordinary V-thread is used.

The accompanying drawing is a longitudinal section of a bolt and nut embodying my improvement.

It will be seen that the upper side a of the thread upon the bolt inclines slightly toward the shank b, and that the corresponding side of the nut-thread is at a right angle with the shank. By means of a ratchet-thread a spiral plane is presented substantially at a right angle to the direction of resistance. The inclination of the upper side a makes what I call a barb-thread7 on the bolt; and the object of this inclina tion, in conjunction with the ratchetthread of the nut, is to insure the bearing of the extreme edge of the male or bolt thread upon the nut-thread, so as to make that the point of greatest friction.

Of course, the angles of the threads may, if desired, be respectively reversed without substantially changing the general el'ect I seek to produce. v

I am aware that ratchet-threaded screws are not new; but I do not know of an example of the combination of threads of different angles in a nut and bolt.

I claim as my improvement- In a combined screw bolt and nut that have threads of the kind known as ratchet or barbed threads, threads so formed that the bearingsurface of one thread will be at 'a different angle from that of the bearing-surface of the other, so that when the device is tightened upon an obj ect the thread of the one shall bear upon the thread of the other at its outer edge only, substantially as shown and described.

H. A. HARVEY.

Witnesses:

J. H. WEITELEGGE, GEO. W. MIATT.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
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US6261039Oct 2, 1996Jul 17, 2001Gary Jack ReedThread repair insert
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US9168069Oct 26, 2012Oct 27, 2015Roger P. JacksonPolyaxial bone anchor with pop-on shank and winged insert with lower skirt for engaging a friction fit retainer
US9179937Jun 6, 2013Nov 10, 2015Globus Medical, Inc.Polyaxial screw
US9186187Mar 21, 2014Nov 17, 2015Globus Medical, Inc.Orthopedic fixation devices and methods of installation thereof
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US9393047Sep 7, 2012Jul 19, 2016Roger P. JacksonPolyaxial bone anchor with pop-on shank and friction fit retainer with low profile edge lock
US9451993Jan 7, 2015Sep 27, 2016Roger P. JacksonBi-radial pop-on cervical bone anchor
US9504496May 17, 2013Nov 29, 2016Roger P. JacksonPolyaxial bone anchor with pop-on shank, friction fit retainer and winged insert
US9522021Mar 31, 2015Dec 20, 2016Roger P. JacksonPolyaxial bone anchor with retainer with notch for mono-axial motion
US9549763Oct 15, 2014Jan 24, 2017Globus Medical, Inc.Orthopedic fixation devices and methods of installation thereof
US9566092Oct 22, 2014Feb 14, 2017Roger P. JacksonCervical bone anchor with collet retainer and outer locking sleeve
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US20110282400 *Jul 19, 2011Nov 17, 2011Jackson Roger PReverse angled threadform with anti-splay Clearance
WO1994029075A1 *Jun 16, 1994Dec 22, 1994Gary Jack ReedApparatus for repairing cracks
Classifications
Cooperative ClassificationF16B25/00, Y10S411/929